Separation of Germanium from Lead in Solutions by Flotation
Flotation of lead as the hydroxide by dodecylamine (in ethanolic solution) proved to be an effective separation method from germanium ions. The experiments were carried out in dilute aqueous solutions of pH 10, on a laboratory scale, and at different concentration ratios. Germanium was further concentrated as a second stage by flotation by using pyrogallol as the activator and dodecylamine as the collector at pH 7. The latter technique was found to float both germanium and lead ions from solution. Germanium separation and its scale-up is discussed
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